Shelf bracket



FIG. 1 a right side, top and rear perspective view of a shelf bracket showing my new design;

FIG. 2 is a right side elevational view thereof, and the side opposite being a mirror image;

FIGS. 3 and 4 are respectively front and rear elevational views thereof; and

FIG. 5 is a top plan thereof. 

The ornamental design for a shelf bracket, as shown. 